<template>
  <el-container class="home-container">
    <!--    头部区域   -->
    <el-header>
      <div>
        <span>电商后台管理系统</span>
      </div>
      <el-button plain type="info" @click="logout">
        退出
      </el-button>
    </el-header>
    <!--    页面主体区域   -->
    <el-container>
      <!--    侧边栏   -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-button" @click="toggleCollapse"> ||| </div>
        <!--    侧边栏菜单区域   -->
        <el-menu
          :collapse=this.isCollapse
          :collapse-transition="false"
          :router="true"
          :unique-opened="true"
          active-text-color="#ffd04b"
          background-color="#333744"
          text-color="#fff"
          :default-active="activePath"
          >
          <!-- 一级菜单 -->
          <el-submenu v-for="item in menuList" :key="item.id" :index="item.id + ''">
            <!-- 一级菜单的模板区域 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconObj[item.id]"></i>
              <!-- 文本 -->
              <span>{{ item.authName }}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item v-for="subItem in item.children" :key="subItem.id" :index=" '/' + subItem.path "  @click="saveNavState('/' + subItem.path )">
              <template slot="title">
                <!-- 图标 -->
                <i class="el-icon-location"></i>
                <!-- 文本 -->
                <span>{{ subItem.authName }}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧主体区域 -->
      <el-main>
        <!-- 路由占位符 -->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  name: 'MyHome',
  data() {
    return {
      //  左侧菜单数据
      menuList: [],
      iconObj: {
        '125': 'iconfont icon-user',
        '103': 'iconfont icon-lifangti2',
        '101': 'iconfont icon-shangpin',
        '102': 'iconfont icon-danju',
        '145': 'iconfont icon-baobiao-xianxing'
      },
      // 折叠菜单
      isCollapse: false,
      //  被激活的链接地址
      activePath: ''
    }
  },
  created() {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout() {
      this.$confirm('此操作将退出此系统, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(() => {
        this.$message({
          type: 'success',
          message: '删除成功!'
        })
        this.$router.push('/login')
        window.sessionStorage.clear()
      }).catch(() => {
        this.$message({
          type: 'info',
          message: '已取消删除'
        })
      })
    },
    async getMenuList() {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      // console.log(res)
      this.menuList = res.data
    },
    toggleCollapse() {
      this.isCollapse = !this.isCollapse
    },
    saveNavState(activePath) {
      window.sessionStorage.setItem('activePath', activePath)
    }
  }
}
</script>

<style lang="less" scoped>
.home-container {
  height: 100%;
}

.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 25px;
  color: white;
}

.el-aside {
  background-color: #333744;

  .el-menu {
    border: none;
  }
}

.el-main {
  background-color: #eaedf1;
}

.iconfont {
  margin-right: 10px;
}

.toggle-button {
  background-color: #4A5064;
  text-align: center;
  color: whitesmoke;
  line-height: 24px;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
